In MM05 (EE), we reviewed literature on bristlecones because these trees were supposed to be unique radio receivers for world temperature. Obviously the specialist literature stood against this proposition. We cited a number of interesting articles by Mooney in American Midland Naturalist in the 1960s – none of which are considered by Juckes in his […]
Just a quick note that I have written an overview of how the blog is setup, with indications for what people should look for if they want a similar setup for their own blog.
Wahl and Ammann 2006 reported that they could “get” something that was sort of HS-ish without principal component analysis. It wasn’t through a simple mean or CVM; it was through Mannian inverse regression. Juckes et al shows many reconstructions using “inverse regression”, mentioning in his conclusions that inverse regression caused over-concentration on a few proxies. […]
As you can see from the plot of the Juckes’ proxies, the Yang composite is a very important contributor to the 20th century blade. The Yang Composite is a mainstay of recent Hockey Team reconstructions – its use in Team reconstructions began in Mann and Jones 2003 and was then “randomly selected” into Osborn and […]
In order to help defray Steve’s costs in moving the hosting of the blog to a virtual private server, I have setup a Paypal tip jar on the left hand side. The suggested amount is just a suggestion – you can put as much or as little as you like. The currency is Canadian dollars […]
When one looks at the plots of the various Juckes proxies against gridcell temperature, the possibility of spurious regression must come to mind. “Spurious regression” has been discussed on this blog from time to time and tries to provide a statistical framework for seemingly high correlations between unrelated series – things like Honduran births and […]
I’ve added a “page” – see left column – with links to various proxy data collations that I’ve archived here. I’ll try to archive some read scripts at some point.
I [Dan Hughes] posted a short discussion of some software Verification and Validation issues on another thread. Here are some additional thoughts. I have a few questions for anyone who have answers. I consider these issues to be essentially show-stoppers as far as use of the results of any of the AOLBCGCM codes and all […]
Michael E. Mann, 2006, Climate Over the Past Two Millennia, Annu. Rev. Earth Planet. Sci. 2007. 35:111–36 is online here , No signs so far of Mann, M.E. et al, Robustness of proxy-based climate field reconstruction methods, 2006 (accepted), which was cited by “Anonymous Referee #2” in the Burger-Cubasch review. Funding generously provided by NSF […]
A miracle has occurred. Osborn has provided identification of the sites used in the various Osborn and Briffa MXD studies. See his webpage here. He notified Craig Loehle and I today. These use various subsets of the large Schweingruber collection made in the late 1980s and early 1990s. They only cover the period after 1400, […]
Climate Audit 
New Mann Paper
Michael E. Mann, 2006, Climate Over the Past Two Millennia, Annu. Rev. Earth Planet. Sci. 2007. 35:111–36 is online here , No signs so far of Mann, M.E. et al, Robustness of proxy-based climate field reconstruction methods, 2006 (accepted), which was cited by “Anonymous Referee #2” in the Burger-Cubasch review. Funding generously provided by NSF […]